/*
 * Copyright © ${year} ${owner} (${email})
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jd.live.agent.governance.counter.internal;

import com.jd.live.agent.core.util.time.Timer;
import com.jd.live.agent.governance.counter.CounterManager;
import com.jd.live.agent.governance.counter.FlyingCounter;
import com.jd.live.agent.governance.counter.ServiceCounter;
import lombok.Getter;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * A class that manages a collection of Counter instances.
 */
public class InternalCounterManager implements CounterManager {

    private final Timer timer;

    @Getter
    private final FlyingCounter flyingCounter = new InternalFlyingCounter();

    private final Map<String, ServiceCounter> counter = new ConcurrentHashMap<>();

    public InternalCounterManager(Timer timer) {
        this.timer = timer;
    }

    @Override
    public ServiceCounter getOrCreateCounter(String service, String group) {
        return counter.computeIfAbsent(getKey(service, group), n -> new InternalServiceCounter(n, timer));
    }

    @Override
    public ServiceCounter getCounter(String service, String group) {
        return counter.get(getKey(service, group));
    }

    private String getKey(String service, String group) {
        return group == null || group.isEmpty() ? service : service + "?group=" + group;
    }

}
